Driving home on I-380 North, saw object in the sky, assumed it was an airplane, but it really wasn't moving until it was gone.

Driving home on I-380N from Philadelphia, I noticed an aircraft in the sky, and being an avid plane lover I was watching it, assuming it was coming in for a landing at Wilkes-Barre/Scranton International airport. But after watching this object not move towards the airport, I then assumed it was just flying in another direction. But after a few seconds, I realized the object really wasn't moving at all, and trying to get a better look at it, it was kind of football shaped and what looked like to be silver. At this point I am thinking "what is this" and by the time I realized I should get my phone out and record it, it flew in a upward direction, and was gone.